If you want the best info about this, watch CNN with Chris Cuomo. He has it, and talks about it with experts almost every night. Nobody quite understands it yet, and some of it sounds a bit psychological -- he's got depression all of a sudden. He's a body builder for years who is often still out of breath months after "recovery." His wife also had it, and had a milder case, but she now has the hair loss. They think it has to do with inflammation of the blood vessels, which of course affects everything. When everyone focuses solely on death especially when talking about how benign it is for the young, they don't consider that a lot of people are having long-term problems. Whether it's permanent or not remains to be seen. But it makes the happy talk about how "few" die of it laughable.